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Method for pulping by broussonetia papyrifera white-bark

A technology of light leaves and white skins, which is applied in the fields of pulping with acid/acid anhydride, pulp bleaching, fat/resin/pitch/wax removal of pulp, etc., can solve problems such as waste, and achieve convenient operation and white pulp The effect of high degree of pollution and low pollution

Active Publication Date: 2014-01-08
KUNMING UNIV OF SCI & TECH TECH IND SALES MANAGEMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the most commonly used pulping method is used, that is, the usual alkali pulping and sulfite pulping, most of them are carried out under high temperature (≥150°C) and high pressure, which requires a specific high temperature resistant pressure vessel, which cannot be used under normal pressure. carry out the pulping process
Moreover, the pectin content in the white bark of guangyechu is nearly 10%, which is a high-value industrial by-product. If it is directly degraded by the usual pulping method, it will inevitably cause waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: the microwave radiation method pulping method of this guangyechu white bark, the specific content is as follows:

[0028] Use the white bark of glabra as the raw material, cut into 2cm-3cm, and small pieces with a width of less than 5mm with a chopping knife; after the pieces are screened, put them in the reactor of the XO-SM300 microwave oven for microwave radiation pulping, specifically Proceed as follows:

[0029] (1) Weigh the raw materials and place them in distilled water so that the ratio of solid to liquid is 1:10 (the ratio of the mass of solid absolute-dry raw materials to the volume of the total solution), soak at room temperature for 60 minutes and then boil for 8 minutes to kill the enzyme;

[0030] (2) Step (1) The soaked raw materials are placed in a 300-mesh nylon bag for filtration and washing, washed 6 times with distilled water, and drained;

[0031] (3) Step (2) After draining, the raw material is placed in the reactor in the XO-SM300 ...

Embodiment 2

[0045] Embodiment 2: the microwave radiation method pulping method of this Cortex glabrata, specific content is as follows:

[0046] Use the white bark of glabra as the raw material, cut into 2cm-3cm, and small pieces with a width of less than 5mm with a chopping knife; after the pieces are screened, put them in the reactor of the XO-SM300 microwave oven for microwave radiation pulping, specifically Proceed as follows:

[0047] (1) Weigh the raw materials and place them in distilled water so that the ratio of solid to liquid is 1:10 (the ratio of the mass of solid absolute dry raw materials to the volume of the total solution), soak at room temperature for 60 minutes and then boil for 8 minutes;

[0048] (2) Step (1) The soaked raw materials are placed in a 300-mesh nylon bag for filtration and washing, washed 6 times with distilled water, and drained;

[0049] (3) Step (2) After draining, the raw material is placed in the reactor in the XO-SM300 microwave oven, and 0.6% of t...

Embodiment 3

[0063] Embodiment 3: the microwave radiation method pulping method of this guangyechu white bark, the specific content is as follows:

[0064] Use the white bark of glabra as the raw material, cut into 2cm-3cm, and small pieces with a width of less than 5mm with a chopping knife; after the pieces are screened, put them in the reactor of the XO-SM300 microwave oven for microwave radiation pulping, specifically Proceed as follows:

[0065] (1) Weigh the raw materials and place them in distilled water so that the ratio of solid to liquid is 1:10 (the ratio of the mass of solid absolute dry raw materials to the volume of the total solution), soak at room temperature for 60 minutes and then boil for 8 minutes;

[0066](2) Step (1) The soaked raw materials are placed in a 300-mesh nylon bag for filtration and washing, washed 6 times with distilled water, and drained;

[0067] (3) Step (2) After draining, the raw material is placed in the reactor in the XO-SM300 microwave oven, and ...

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Abstract

The invention discloses a method for pulping by broussonetia papyrifera white-bark which is a novel raw material selectively bred in recent years through microwave radiation. The method comprises the following steps: adopting,, and carrying out microwave radiation on an adopted bast fiber raw material, namely broussonetia papyrifera white-bark at normal pressure by using H2SO3, CH3COOOH, NaOH, H2O2, Na2P2O7 and an EDTA (Ethylene Diamine Tetraacetic Acid) additive to prepare pulp. According to the method, a by-product, namely pectin with high value can be extracted in the pulping process. The prepared broussonetia papyrifera white-bark long-fibered pulp has the characteristics of high virgin pulp yield and high whiteness. The method synchronizes digesting and bleaching, the pulping process can be carried out at normal pressure, the time is short, and the pollution is slight.

Description

technical field [0001] The invention belongs to the technical field of microwave radiation pulping of bast raw materials, in particular to a pulping method in which microwave radiation of glaucous bark is synergistic with sulfurous acid, peracetic acid, sodium hydroxide and hydrogen peroxide . Background technique [0002] The light-leaved mulberry is a variety selected from the wild paper tree in Japan in recent years. It belongs to the genus Moraceae. It is a new paper-making raw material selected in recent years. It is a fast-growing broad-leaved species and is easy to grow. It needs to be cut and peeled every year. In order to promote its continuous growth, its skin is a renewable resource, which can be cut every 2 to 3 years, and can make better use of land resources without damaging the ecological environment. The whole skin of Guangyechu accounts for about 12% of the whole bar, and the white skin accounts for about 72% of the whole bar. White bark has low lignin con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00D21C3/06D21C9/08D21C9/16
Inventor 陈克利相浩亮何洁
Owner KUNMING UNIV OF SCI & TECH TECH IND SALES MANAGEMENT
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